Roaming Gateway Enabling Location Based Services (lbs) Roaming for User Plane in Cdma Networks Without Requiring Use of a Mobile Positioning Center (mpc)

1. A method of facilitating location based services (LBS) to a roaming mobile device, comprising: receiving IS-801 session data containing a message originated by an interrogating mobile device in a first carrier network to a routing LBS gateway, wherein said received IS-801 session data determines: an identity of said visited carrier network; and an identity of an original home network of said interrogating mobile device; routing said IS-801 session data to a correct visited carrier network position determining entity (PDE) that contains correct base station almanac (BSA) data; and returning assistance data to said interrogating mobile device; wherein said routing LBS gateway is located outside of said first and second carrier network; and wherein LBS roaming is facilitated between CDMA network carriers that use a PDE and not a mobile positioning center (MPC) to provide assistance data to a mobile device.

2. The method of facilitating location based services (LBS) to a roaming mobile device according to claim 1 , wherein: said identity of said visited carrier network includes a system ID (SID) and a network ID (NID).

3. The method of facilitating location based services (LBS) to a roaming mobile device according to claim 1 , wherein: said mobile device is a CDMA device.

4. The method of facilitating location based services (LBS) to a roaming mobile device according to claim 1 , wherein: said routing LBS gateway is located outside of said first carrier network.

5. The method of facilitating location based services (LBS) to a roaming mobile device according to claim 1 , wherein: said routing LBS gateway is located outside of said second carrier network.

6. A method of facilitating location based services (LBS) to a roaming mobile device, comprising: receiving IS-801 session data containing a message originated by an interrogating mobile device in a first carrier network to a routing LBS gateway; routing said IS-801 session data to a correct visited carrier network position determining entity (PDE) that contains correct base station almanac (BSA) data; returning assistance data to said interrogating mobile device; and querying a PDE route table to determine an Internet protocol (IP) address and port number of said correct visited PDE; wherein LBS roaming is facilitated between CDMA network carriers that use a PDE and not a mobile positioning center (MPC) to provide assistance data to a mobile device; and whereby a TCP/IP connection is established between a roaming LBS routing gateway and a correct visited PDE.

7. Apparatus for facilitating location based services (LBS) to a roaming mobile device, comprising: means for receiving IS-801 session data containing a message originated by an interrogating mobile device in a first carrier network to a routing LBS gateway; means for routing said IS-801 session data to a correct visited carrier network position determining entity (PDE) that contains correct base station almanac (BSA) data, wherein said received IS-801 session data determines: an identity of said visited carrier network; and an identity of an original home network of said interrogating mobile device; and means for returning assistance data to said interrogating mobile device; wherein LBS roaming is facilitated between CDMA network carriers that use a PDE and not a mobile positioning center (MPC) to provide assistance data to a mobile device; and wherein said routing LBS gateway is located outside of said CDMA network carriers' networks.

8. The apparatus for facilitating location based services (LBS) to a roaming mobile device according to claim 7 , wherein: said identity of said visited carrier network includes a system ID (SID) and a network ID (NID).

9. The apparatus for facilitating location based services (LBS) to a roaming mobile device according to claim 7 , wherein: said mobile device is a CDMA device.

10. The apparatus for facilitating location based services (LBS) to a roaming mobile device according to claim 7 , wherein: said routing LBS gateway is located outside of said first carrier network.

11. The apparatus for facilitating location based services (LBS) to a roaming mobile device according to claim 7 , wherein: said routing LBS gateway is located outside of the second carrier network.

12. Apparatus for facilitating location based services (LBS) to a roaming mobile device, comprising: means for receiving IS-801 session data containing a message originated by an interrogating mobile device in a first carrier network to a routing LBS gateway; means for routing said IS-801 session data to a correct visited carrier network position determining entity (PDE) that contains correct base station almanac (BSA) data; means for returning assistance data to said interrogating mobile device; and means for querying a PDE route table to determine an Internet protocol (IP) address and port number of said correct visited PDE; wherein LBS roaming is facilitated between CDMA network carriers that use a PDE and not a mobile positioning center (MPC) to provide assistance data to a mobile device; and whereby a TCP/IP connection is established between a roaming LBS routing gateway and a correct visited PDE.